Emery andrews



(No Model.)

B. ANDREWS.

NUT LOCKING WASHER. No. 829,615. Patente l Nov. 3, 1885.

N. FETERS. Phola-blhogmpher. Walkinglun. D. C.

UNrTnD STATES PATENT QFiucE.

EMERY ANDBEXVS, OF KENN EBUN K, MAINE, ASSIGNOR TO THE LEATHEROIDMANUFACTURING COMPANY, OF SAME PLACE.

NUT=LCK|NG WASHER.

BPEGIFECATION forming part of Letters Patent No. 329,615, dated November3, 1885.

Application filed August 14, 1885. Serial No. 174,383. (No model.)

To all whom it may concern.-

Be it known that I, EMERY ANDREWS, of Kennebunk, in the county of Yorkand State of Maine, have invented a new and useful Improvement inXVashers for Nuts, of which the following, taken in connection with theaccompanying drawings, is a specification.

My invention relates to that class of washers which by their elasticityserve to lock the nuts beneath which they are placed, and is intended toovercome the difliculties found in the practical use of the variousiron-clad washers now in use; and it consists of the combination, withan elastic washer, of a double inclosing metal washer, the parts ofwhich are so connected that in the operation of screwing down the nutthe elastic washer will be protected from any sliding mOtion against ametallic surface, which takes places in most forms of' washers now inuse, and tends to disintegrate the elastic portion of the washer.

In the drawings, Figure 1 represents the metallic double cover aspunched out; Fig. 2, a cross-section of the same bent up to inclose theelastic washer; Fig. 3, aperspective ofthe same, Fig. 4, the elasticwasher; Fig. 5, the washer complete; and Fig. 6 a modified form of thesame.

In carrying out my invention I punch from sheet iron or steel ofsuitable thickness (usually about one twenty-fourth of an inch) 2.blank, as shown in Fig. 1, each of the circular portions thereof beingof a diameter equal to or a little larger than that required in thefinished washer, the connecting portion 0 of a length about equal to thethickness of the elastic washer, Fig. 4. This blank may have a slightflange turned up along the edge of the circular parts at the dotted lineB B, and it is then bent to the shape shownin Figs.2 and 3, the endsbeing preferably slightly nearer together than the thickness of theelastic washer, so that when it is inserted between them the elasticityof the metal will cause it to hold the elastic washer firmly in place,as shown in Figs. 5 and 6. The flanges B B may be dispensed with and themetal covers left flat, as shown in Fig. 6; but I prefer the form shownin Fig. 5. The elastic washer I prefer to make of paper chemicallytreatedsuch as is known to the trade as leatheroid or vulcanized fiber,but any suitable elastic material may be used. It will be seen that themetallic covers are cheaply made, and so constructed that there can beno sliding action on the surface of the elastic washer D, as if themetal cover next to the nut turns with it the other metal cover turns,and also the inclosed elastic washer, all of necessity moving together,and thus preventing any frictional 6o sliding between the parts of thewasher.

I claim 1. A nut-washer composed of the double metallic cover A A, thetwo parts thereof being connected by a neck, 0, in combination with theelastic washer D, substantially as shown and described.

2. A nut-washer composed of the double concave metallic cover A A, thetwo parts of which are connected by a neck, 0, in combination with anelastic washer, D, substantially as set forth.

3. A nut-washer composed of a double metallic cover, A A, the two partsthereof being connected by an elastic neck, 0, so as to hold betweenthem with a yielding pressure the elastic washer D, substantially asspecified.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 6th day of August, A. D.1885.

EMERY ANDREW'S.

Witnesses:

S. G. CHASE, G. LITTLEFIELD.

